/**************************************************************************
*
* Copyright 2007 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/*
* Authors:
* Keith Whitwell <keithw@vmware.com>
*/
#include "main/macros.h"
#include "main/framebuffer.h"
#include "main/state.h"
#include "st_context.h"
#include "st_atom.h"
#include "st_debug.h"
#include "st_program.h"
#include "st_util.h"
#include "pipe/p_context.h"
#include "pipe/p_defines.h"
#include "cso_cache/cso_context.h"
static GLuint
translate_fill(GLenum mode)
{
switch (mode) {
case GL_POINT:
return PIPE_POLYGON_MODE_POINT;
case GL_LINE:
return PIPE_POLYGON_MODE_LINE;
case GL_FILL:
return PIPE_POLYGON_MODE_FILL;
case GL_FILL_RECTANGLE_NV:
return PIPE_POLYGON_MODE_FILL_RECTANGLE;
default:
assert(0);
return 0;
}
}
void
st_update_rasterizer(struct st_context *st)
{
struct gl_context *ctx = st->ctx;
struct pipe_rasterizer_state *raster = &st->state.rasterizer;
const struct gl_program *fragProg = ctx->FragmentProgram._Current;
memset(raster, 0, sizeof(*raster));
/* _NEW_POLYGON, _NEW_BUFFERS
*/
{
raster->front_ccw = (ctx->Polygon.FrontFace == GL_CCW);
/* _NEW_TRANSFORM */
if (ctx->Transform.ClipOrigin == GL_UPPER_LEFT) {
raster->front_ccw ^= 1;
}
/*
* Gallium's surfaces are Y=0=TOP orientation. OpenGL is the
* opposite. Window system surfaces are Y=0=TOP. Mesa's FBOs
* must match OpenGL conventions so FBOs use Y=0=BOTTOM. In that
* case, we must invert Y and flip the notion of front vs. back.
*/
if (st->state.fb_orientation == Y_0_BOTTOM) {
/* Drawing to an FBO. The viewport will be inverted. */
raster->front_ccw ^= 1;
}
}
/* _NEW_LIGHT_STATE */
raster->flatshade = !st->lower_flatshade &&
ctx->Light.ShadeModel == GL_FLAT;
raster->flatshade_first = ctx->Light.ProvokingVertex ==
GL_FIRST_VERTEX_CONVENTION_EXT;
/* _NEW_LIGHT_STATE | _NEW_PROGRAM */
if (!st->lower_two_sided_color)
raster->light_twoside = _mesa_vertex_program_two_side_enabled(ctx);
/*_NEW_LIGHT_STATE | _NEW_BUFFERS */
raster->clamp_vertex_color = !st->clamp_vert_color_in_shader &&
ctx->Light._ClampVertexColor;
/* _NEW_POLYGON
*/
if (ctx->Polygon.CullFlag) {
switch (ctx->Polygon.CullFaceMode) {
case GL_FRONT:
raster->cull_face = PIPE_FACE_FRONT;
break;
case GL_BACK:
raster->cull_face = PIPE_FACE_BACK;
break;
case GL_FRONT_AND_BACK:
raster->cull_face = PIPE_FACE_FRONT_AND_BACK;
break;
}
}
else {
raster->cull_face = PIPE_FACE_NONE;
}
/* _NEW_POLYGON
*/
{
if (ST_DEBUG & DEBUG_WIREFRAME) {
raster->fill_front = PIPE_POLYGON_MODE_LINE;
raster->fill_back = PIPE_POLYGON_MODE_LINE;
}
else {
raster->fill_front = translate_fill(ctx->Polygon.FrontMode);
raster->fill_back = translate_fill(ctx->Polygon.BackMode);
}
/* Simplify when culling is active:
*/
if (raster->cull_face & PIPE_FACE_FRONT) {
raster->fill_front = raster->fill_back;
}
if (raster->cull_face & PIPE_FACE_BACK) {
raster->fill_back = raster->fill_front;
}
}
/* _NEW_POLYGON
*/
if (ctx->Polygon.OffsetPoint ||
ctx->Polygon.OffsetLine ||
ctx->Polygon.OffsetFill) {
raster->offset_point = ctx->Polygon.OffsetPoint;
raster->offset_line = ctx->Polygon.OffsetLine;
raster->offset_tri = ctx->Polygon.OffsetFill;
raster->offset_units = ctx->Polygon.OffsetUnits;
raster->offset_scale = ctx->Polygon.OffsetFactor;
raster->offset_clamp = ctx->Polygon.OffsetClamp;
}
raster->poly_stipple_enable = ctx->Polygon.StippleFlag;
/* Multisampling disables point, line, and polygon smoothing.
*
* GL_ARB_multisample says:
*
* "If MULTISAMPLE_ARB is enabled, and SAMPLE_BUFFERS_ARB is a value of
* one, then points are rasterized using the following algorithm,
* regardless of whether point antialiasing (POINT_SMOOTH) is enabled"
*
* "If MULTISAMPLE_ARB is enabled, and SAMPLE_BUFFERS_ARB is a value of
* one, then lines are rasterized using the following algorithm,
* regardless of whether line antialiasing (LINE_SMOOTH) is enabled"
*
* "If MULTISAMPLE_ARB is enabled, and SAMPLE_BUFFERS_ARB is a value of
* one, then polygons are rasterized using the following algorithm,
* regardless of whether polygon antialiasing (POLYGON_SMOOTH) is
* enabled"
*/
/* _NEW_MULTISAMPLE */
bool multisample = _mesa_is_multisample_enabled(ctx);
raster->multisample = multisample;
/* _NEW_POLYGON | _NEW_MULTISAMPLE */
raster->poly_smooth = !multisample && ctx->Polygon.SmoothFlag;
/* _NEW_POINT
*/
raster->point_size = ctx->Point.Size;
/* _NEW_POINT | _NEW_MULTISAMPLE */
raster->point_smooth = !multisample && !ctx->Point.PointSprite &&
ctx->Point.SmoothFlag;
/* _NEW_POINT | _NEW_PROGRAM
*/
if (ctx->Point.PointSprite) {
/* origin */
if ((ctx->Point.SpriteOrigin == GL_UPPER_LEFT) ^
(st->state.fb_orientation == Y_0_BOTTOM))
raster->sprite_coord_mode = PIPE_SPRITE_COORD_UPPER_LEFT;
else
raster->sprite_coord_mode = PIPE_SPRITE_COORD_LOWER_LEFT;
/* Coord replacement flags. If bit 'k' is set that means
* that we need to replace GENERIC[k] attrib with an automatically
* computed texture coord.
*/
raster->sprite_coord_enable = ctx->Point.CoordReplace &
((1u << MAX_TEXTURE_COORD_UNITS) - 1);
if (!st->needs_texcoord_semantic &&
fragProg->info.inputs_read & VARYING_BIT_PNTC) {
raster->sprite_coord_enable |=
1 << st_get_generic_varying_index(st, VARYING_SLOT_PNTC);
}
raster->point_quad_rasterization = 1;
raster->point_tri_clip = st->ctx->API == API_OPENGLES2;
}
/* ST_NEW_VERTEX_PROGRAM
*/
raster->point_size_per_vertex = st_point_size_per_vertex(ctx);
if (!raster->point_size_per_vertex) {
/* clamp size now */
raster->point_size = CLAMP(ctx->Point.Size,
ctx->Point.MinSize,
ctx->Point.MaxSize);
}
/* _NEW_LINE | _NEW_MULTISAMPLE
*/
if (!multisample && ctx->Line.SmoothFlag) {
raster->line_smooth = 1;
raster->line_width = CLAMP(ctx->Line.Width,
ctx->Const.MinLineWidthAA,
ctx->Const.MaxLineWidthAA);
}
else {
raster->line_width = CLAMP(ctx->Line.Width,
ctx->Const.MinLineWidth,
ctx->Const.MaxLineWidth);
}
raster->line_rectangular = multisample || ctx->Line.SmoothFlag;
/* When the pattern is all 1's, it means line stippling is disabled */
raster->line_stipple_enable = ctx->Line.StippleFlag && ctx->Line.StipplePattern != 0xffff;
raster->line_stipple_pattern = ctx->Line.StipplePattern;
/* GL stipple factor is in [1,256], remap to [0, 255] here */
raster->line_stipple_factor = ctx->Line.StippleFactor - 1;
/* _NEW_MULTISAMPLE | _NEW_BUFFERS */
raster->force_persample_interp =
!st->force_persample_in_shader &&
raster->multisample &&
ctx->Multisample.SampleShading &&
ctx->Multisample.MinSampleShadingValue *
_mesa_geometric_samples(ctx->DrawBuffer) > 1;
/* _NEW_SCISSOR */
raster->scissor = !!ctx->Scissor.EnableFlags;
/* gl_driver_flags::NewFragClamp */
raster->clamp_fragment_color = !st->clamp_frag_color_in_shader &&
ctx->Color._ClampFragmentColor;
raster->half_pixel_center = 1;
if (st->state.fb_orientation == Y_0_TOP)
raster->bottom_edge_rule = 1;
/* _NEW_TRANSFORM */
if (ctx->Transform.ClipOrigin == GL_UPPER_LEFT)
raster->bottom_edge_rule ^= 1;
/* ST_NEW_RASTERIZER */
raster->rasterizer_discard = ctx->RasterDiscard;
if (ctx->TileRasterOrderFixed) {
raster->tile_raster_order_fixed = true;
raster->tile_raster_order_increasing_x = ctx->TileRasterOrderIncreasingX;
raster->tile_raster_order_increasing_y = ctx->TileRasterOrderIncreasingY;
}
if (st->edgeflag_culls_prims) {
/* All edge flags are FALSE. Cull the affected faces. */
if (raster->fill_front != PIPE_POLYGON_MODE_FILL)
raster->cull_face |= PIPE_FACE_FRONT;
if (raster->fill_back != PIPE_POLYGON_MODE_FILL)
raster->cull_face |= PIPE_FACE_BACK;
}
/* _NEW_TRANSFORM */
raster->depth_clip_near = st->clamp_frag_depth_in_shader ||
!ctx->Transform.DepthClampNear;
raster->depth_clip_far = st->clamp_frag_depth_in_shader ||
!ctx->Transform.DepthClampFar;
raster->depth_clamp = !raster->depth_clip_far;
raster->clip_plane_enable = ctx->Transform.ClipPlanesEnabled;
raster->clip_halfz = (ctx->Transform.ClipDepthMode == GL_ZERO_TO_ONE);
/* ST_NEW_RASTERIZER */
if (ctx->ConservativeRasterization) {
if (ctx->ConservativeRasterMode == GL_CONSERVATIVE_RASTER_MODE_POST_SNAP_NV)
raster->conservative_raster_mode = PIPE_CONSERVATIVE_RASTER_POST_SNAP;
else
raster->conservative_raster_mode = PIPE_CONSERVATIVE_RASTER_PRE_SNAP;
} else if (ctx->IntelConservativeRasterization) {
raster->conservative_raster_mode = PIPE_CONSERVATIVE_RASTER_POST_SNAP;
} else {
raster->conservative_raster_mode = PIPE_CONSERVATIVE_RASTER_OFF;
}
raster->conservative_raster_dilate = ctx->ConservativeRasterDilate;
raster->subpixel_precision_x = ctx->SubpixelPrecisionBias[0];
raster->subpixel_precision_y = ctx->SubpixelPrecisionBias[1];
cso_set_rasterizer(st->cso_context, raster);
}